城市景观水体富营养化评价的升半Г型分布指数公式

发布时间：2018-02-11 16:44

本文关键词： 景观水体富营养化评价升半Г型分布公式规范化粒子群算法　出处：《环境科学学报》2017年03期 　论文类型：期刊论文

【摘要】：构建湖泊富营养化评价指标体系,采用升半Г型分布曲线模拟湖泊富营养化发展过程,在对该评价指标体系数据规范变换预处理基础上,通过对升半Г型分布函数进行改进,提出用于湖泊富营养化评价的升半Г型分布指数公式.公式中的参数采用粒子群算法优化后,得到适用于多区域、多项指标的具有通用性和普适性的湖泊富营养化评价公式.为了解成都市典型景观水体氮磷污染特性,分别于2011年和2015年对成都市典型景观湖泊水体进行水体富营养化监测和评价.评价过程表明,升半Г型分布指数公式用于湖泊富营养化评价,消除了评价指标数目多少的限制和区域性评价指标各异性的限制,省去了复杂的编程计算工作,具有一定的理论意义和实用价值,为评价模型的普适化、简单化提供了一条途径.评价结果表明:2015年北湖为中~富营养等级,东湖、南湖、簇锦湖和浣花溪湖为富~重富营养等级.2011年人民公园湖泊处于中~富等级,北湖、名都公园湖泊、东湖处于富~重富等级,塔子山公园湖泊、浣花溪湖处于重富~极富等级.塔子山公园、浣花溪湖、东湖、南湖周边生活小区聚集,主要受周边生活污水影响较大.通过对成都市市区典型湖泊富营养化评价,能够得知成都市景观水体水质现状,为景观水体防治和管理提供了决策依据.
[Abstract]:The evaluation index system of lake eutrophication was constructed, and the eutrophication development process of lake was simulated by using the ascending half distribution curve. On the basis of the pretreatment of the data standard transformation of the evaluation index system, the distribution function of the eutrophication was improved. In this paper, an exponential formula of ascending semitutrient distribution for eutrophication evaluation of lakes is proposed. The parameters in the formula are optimized by particle swarm optimization, and the formula is suitable for multiple regions. In order to understand the nitrogen and phosphorus pollution characteristics of typical landscape water in Chengdu, a universal and universal evaluation formula of lake eutrophication is presented. The eutrophication monitoring and evaluation of typical landscape lakes in Chengdu were carried out on 2011 and 2015 respectively. The limitations of the number of evaluation indexes and the differences of regional evaluation indexes are eliminated, and the complicated programming calculation work is eliminated, which has certain theoretical significance and practical value. The evaluation results show that in 2015, the North Lake, the East Lake, the South Lake, the Zhujin Lake and the Huanhuaxi Lake were the rich and the heavy eutrophication grades. In 2011, the people's Park Lake was in the middle to the rich grade, the North Lake to the North Lake, and to the East Lake, the South Lake and the Huanhuaxi Lake. The lake of Mingdu Park, East Lake is rich to heavy rich, Tazishan Park Lake, Wun Huaxi Lake is in heavy rich ~ extremely rich grade. Tazishan Park, Huanhuaxi Lake, East Lake, South Lake surrounding living quarters gather, Through the eutrophication evaluation of typical lakes in Chengdu, we can know the present situation of water quality of landscape water in Chengdu, and provide the decision basis for the prevention and management of landscape water.
【作者单位】：成都信息工程大学;
【基金】：国家自然科学基金(No.51209024) 国家社会科学基金(No.13BGL009) 四川省社科项目(No.SC15TJ019,SC14C007) 四川省教育厅项目(No.15ZA0192,15ZA0189)~~
【分类号】：X824

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